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DBMS > Microsoft Azure Cosmos DB vs. PlanetScale vs. SQL.JS

System Properties Comparison Microsoft Azure Cosmos DB vs. PlanetScale vs. SQL.JS

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Editorial information provided by DB-Engines
NameMicrosoft Azure Cosmos DB infoformer name was Azure DocumentDB  Xexclude from comparisonPlanetScale  Xexclude from comparisonSQL.JS  Xexclude from comparison
DescriptionGlobally distributed, horizontally scalable, multi-model database serviceScalable, distributed, serverless MySQL database platform built on top of VitessPort of SQLite to JavaScript
Primary database modelDocument store
Graph DBMS
Key-value store
Wide column store
Relational DBMSRelational DBMS
Secondary database modelsSpatial DBMSDocument store
Spatial DBMS
DB-Engines Ranking infomeasures the popularity of database management systemsranking trend
Trend Chart
Score27.71
Rank#27  Overall
#4  Document stores
#2  Graph DBMS
#3  Key-value stores
#3  Wide column stores
Score1.49
Rank#155  Overall
#72  Relational DBMS
Score0.63
Rank#241  Overall
#112  Relational DBMS
Websiteazure.microsoft.com/­services/­cosmos-dbplanetscale.comsql.js.org
Technical documentationlearn.microsoft.com/­azure/­cosmos-dbplanetscale.com/­docssql.js.org/­documentation/­index.html
DeveloperMicrosoftPlanetScaleAlon Zakai infoenhancements implemented by others
Initial release201420202012
License infoCommercial or Open SourcecommercialcommercialOpen Source
Cloud-based only infoOnly available as a cloud serviceyesyesno
DBaaS offerings (sponsored links) infoDatabase as a Service

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Implementation languageGoJavaScript
Server operating systemshostedDocker
Linux
macOS
server-less, requires a JavaScript environment (browser, Node.js)
Data schemeschema-freeyesyes
Typing infopredefined data types such as float or dateyes infoJSON typesyesyes
XML support infoSome form of processing data in XML format, e.g. support for XML data structures, and/or support for XPath, XQuery or XSLT.no
Secondary indexesyes infoAll properties auto-indexed by defaultyes
SQL infoSupport of SQLSQL-like query languageyes infowith proprietary extensionsyes infoSQL-92 is not fully supported
APIs and other access methodsDocumentDB API
Graph API (Gremlin)
MongoDB API
RESTful HTTP API
Table API
ADO.NET
JDBC
MySQL protocol
ODBC
JavaScript API
Supported programming languages.Net
C#
Java
JavaScript
JavaScript (Node.js)
MongoDB client drivers written for various programming languages
Python
Ada
C
C#
C++
D
Delphi
Eiffel
Erlang
Haskell
Java
JavaScript (Node.js)
Objective-C
OCaml
Perl
PHP
Python
Ruby
Scheme
Tcl
JavaScript
Server-side scripts infoStored proceduresJavaScriptyes infoproprietary syntaxno
TriggersJavaScriptyesno
Partitioning methods infoMethods for storing different data on different nodesSharding infoImplicit feature of the cloud serviceShardingnone
Replication methods infoMethods for redundantly storing data on multiple nodesyes infoImplicit feature of the cloud serviceMulti-source replication
Source-replica replication
none
MapReduce infoOffers an API for user-defined Map/Reduce methodswith Hadoop integration infoIntegration with Hadoop/HDInsight on Azure*nono
Consistency concepts infoMethods to ensure consistency in a distributed systemBounded Staleness
Consistent Prefix
Eventual Consistency
Immediate Consistency infoConsistency level configurable on request level
Session Consistency
Eventual Consistency across shards
Immediate Consistency within a shard
none
Foreign keys infoReferential integritynoyes infonot for MyISAM storage engineyes
Transaction concepts infoSupport to ensure data integrity after non-atomic manipulations of dataMulti-item ACID transactions with snapshot isolation within a partitionACID at shard levelACID
Concurrency infoSupport for concurrent manipulation of datayesyes infotable locks or row locks depending on storage engine
Durability infoSupport for making data persistentyesyesno infoexcept by serializing a db to a file
In-memory capabilities infoIs there an option to define some or all structures to be held in-memory only.yesyes
User concepts infoAccess controlAccess rights can be defined down to the item levelUsers with fine-grained authorization concept infono user groups or rolesno

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More resources
Microsoft Azure Cosmos DB infoformer name was Azure DocumentDBPlanetScaleSQL.JS
DB-Engines blog posts

New kids on the block: database management systems implemented in JavaScript
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